<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>12_指令_自定义指令</title>
</head>
<body>

<!--
1. 注册全局指令
  Vue.directive('my-directive', function(el, binding){
    el.innerHTML = binding.value.toupperCase()
  })
2. 注册局部指令
  directives : {
    'my-directive' : {
        bind (el, binding) {
          el.innerHTML = binding.value.toupperCase()
        }
    }
  }
3. 使用指令
  v-my-directive='xxx'
-->
<!--
需求: 自定义2个指令
  1. 功能类型于v-text, 但转换为全大写
  2. 功能类型于v-text, 但转换为全小写
-->

<div id="test">
	<p v-upper-text="msg"></p>
	<p v-lower-text="msg"></p>
</div>

<div id="test2">
	<p v-upper-text="msg"></p>
	<p v-lower-text="msg"></p>
</div>

<script type="text/javascript" src="../vue.js"></script>
<script type="text/javascript">
    // 注册一个全局指令
    // el: 指令所在的标签对象
    // binding: 包含指令相关数据的容器对象
    Vue.directive('upper-text', function (el, binding) {
        console.log(el, binding)
        el.textContent = binding.value.toUpperCase()
    })
    new Vue({
        el: '#test',
        data: {
            msg: "I Like You"
        },
        // 注册局部指令
        directives: {
            'lower-text'(el, binding) {
                console.log(el, binding)
                el.textContent = binding.value.toLowerCase()
            }
        }

    })

    new Vue({
        el: '#test2',
        data: {
            msg: "I Like You Too"
        }
    })
</script>
</body>
</html>